Pin-tumbler lock.



P. F. UGENBRAUN.

PIN TUMBLER LOCK.

APPLICATION HLED JAN.25, 17912 Patented Dec. 17, 1912.

` UNiTED STATES ViArENfirA oiiicn.;

PETER F. AUGENBRAUN, oF STANFORD, CONNECTICUT, AssloNoR-To k:rena -YALEn 'row-NE MANUFACTURING COMPANY, ors'rAMFoRD, coNNEC'iIcU'r.`

P IN-TUMBLER Loox.

Td all whom it may concern:-

` Be it known 'that I, PETER -F. AUGEN- imAUN, acitizen' of the vUnitedStates, residing at Stamford, in the countyof Fair- `field and State ofConnecticut, have invented certain. new and luseful Improvements inPin-Tuin ler Locks; and I do hereby declare th -following to be a full,clear, and exactvdescription of the invention, such as will enableothers skilled in the art to' which it Ia/ppertains to make and usethe'same.'

linvention relates to an improvement in pin tumbler locks, and moreparticularly 'to an improvement on the construction dis.

closed in Patent'No. 966,295, granted to me. August 2nd1910. Y v

Inpin'tumbler locks as ordinarily con7 structed, Awhen the key isinserted in 'the plug and turned, the key is prevented from` eingwithdrawn, by reason of the fact that the -tumblers carried by the plug,are out of alinement with the tumbler holesv in the cylinder,consequently they cannot be moved longitudinally by the bittings ofthe'key, and as the tumblers engage the bitt-ings of the'key, the latter isheld against withdrawal. The tuinblers must have some play` in theirholes, and when a key is inserted and withdrawn the tuniblers are pushedfirstagainst one side and then against the other side of the tumblerholes, which results in some wear and distortion both ou thetumblers'and holes and causes unsatisfactory action of the .tumblers YIn the constructiondiscloied in `mypatent above referredto, 'I4 take thestrain and the .consequent wear from the tumble'rs` and plug and*transfer it to the c linder and key, by means of a. plate secure 'tothe rear face of the cylinder,- with one edge resting' in a groove intheplug. While this patented construction is mechanically excellent, itinvolves in some instances the increasing`of. the depth of the lock, andthe object of the present invention is to provide a simpler and lessYexpensive means forlocking the plug to the cylinderlwithout increasingthe pointed out iu the claims.-

depth of the lock. Y

With these objects in view my invent-ion consists in the parts andcombinat )ns of parts as will be more fully'explained and `In, theaccompanying drawings, Figuie 1 is a view in longitudinal section of myiml Y Specification of Lctterslatent. v v Patented Dc. 17,1912.,vApplcatiin-lcrl January 25, 1912. Serial No. 673,339.k i i proved lock.Fig. 2 is a View in" elevation of the 'rear end of saine, showing thebolt.Y Fig. 3 is a sectional view on the line wof Fig. 1. Fig. 4 is a.vview-of` the plug detached and4 F155 5 is a view of the locking plateor segment.' l 5 holes or recessesV arranged to aline with tion of thepin tumblers 3, which lat'teiare of the well fltnown' construction',and.A are operated by the key in 'the usualinanner.'

` 6o 1' represents a cylinder, provided with a lcylindrical bere-for theplug.2, and with The plug 2 is cylindrical in "shape, :and is i providedwith` Y al Y key-'vay` 41.4iextending throughoutliits length,v id.is-5,provided at .its innerendand at pontjjustl outside of and alsoagainst'any longitudinal4 movement,

hence any longitudinal .pull-'on the plug vthrough the key. istransmitted-,to the c l- Y inder through them locking v plate 6.' Y, helooking plate 6 tits snugly withinthegr'oove,

and as' the latter extendsl only, part' Wayl around the plug, it followsthat; when the plug is rotated, the locking plate -also'rotates andoperates at all cimestov liold ltheplug exactly in its proper Aposition.witl1. relation to the cylinder, so that.as Ythelie'y with*A drawnthere can be noinovement ofthe plug.

within the cylinder, therefore insuring' a smooth action of thetumblers.YA

The plug locking plate 6 is in the preseiit instance held in ing cam 7,Awhic itsfront or inner face to cover the locking pla/fe and hold it inplace within its groove, and the bolt actuating cam 7 is held in placeby the usual cam 8 which is secured by screws to the end of tlieplug. The bolt actuating cam is free Ato have a turnin inoven'ient on the plug,and as before state isheld in place by the usualcam 8, and iii lpositionby the bolt actut latter is counterbored ori:

locks when the cam 7,is not used cam 8 would be'counterbored to coverand inclose" the lockingplatc G. With this improvement the locking plate6 is simply dropped into a slot in the plug and is retained thereby thelbolt actuating c am or other part secured to the rear end of the plug,the said cam or other partbeing preferably counterbored to receive andhouse the locking plate With my present improvement the locking platemoves with the plug, and as the retaining cam or parti: recessed toreceive the plate, there is no increase whatever in the depth of thelock. Y

It is evident that many slight changes might be resorted to in therelative arrangerent 0..' parts shown and described without departingfrom the. spirit and scope of my invention Hence fI would have 1tunderl.

5' stood that I do notwish to confine myself to the exact constructionand arrangementof partsv shown and described, but

Having fully described my invention what I claim as new and desire tosecure by Letters-Patent, is Y 1. In a pin tumbler lock, the combinationof a cylinder and its plug, the latter having a peripheral grooveadjacent its rear end, a locking plate looselyseated in said groove andbearing against the rear face o the c lindcr, and means secured to theplug or holding the locking plate in position.A

2- In a pin tumbler lock, the combination of a cylinder and' its keyplug, the latter having a peripheral (grooveadjacent its rear end, acrescent s'hape locking plate mounted in said groove and overhanging therear face of the cylinder, and means for locking the plate Within thegroove in said key plug, whereby the plate turns with the key plug andlocks the latter against endwise movement.

3. In a in tumbler lock the combination of a cylin er and its plug, thelatter having a peripheral groove adjacent its inner end, the saidgroove extending only partly around the plug, a lockin plate fittingsaid groove and overhanging t e rear face of the cylinder and meanscarried by the plug for locking the plate within said groove.

4. In a in tumbler lock, the combination with a cylinder and its plug,the latter having a peripheral groove adjacent its free end, the saidgroove extending only partly around said plug, a locking plate fillingsaid 'groove and having bearing against the rear face of the cylinderand acam secured to the end of the lug and counterbored to cover andhouse t e locking plate.

`In testimony whereof, I have signed this specification in the presenceof two subscribing witnesses.

PETER' F. AUGENBRAUN.

Witnesses:

SCHUYLER Malmrrr, CHARLES EDGAR VAIL.

